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Rhodium-Catalyzed Asymmetric Cyclization/Hydroboration of 1,6-Enynes

โœ Scribed by Kinder, Robert E.; Widenhoefer, Ross A.

Book ID
127157532
Publisher
American Chemical Society
Year
2006
Tongue
English
Weight
74 KB
Volume
8
Category
Article
ISSN
1523-7060

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Rhodium catalyzed [2+2+2] cyclizations o
Rhodium catalyzed [2+2+2] cyclizations of 1,6-enynes
โœ Chang Ho Oh; Hye Rhyan Sung; Seung Hyun Jung; Young Mook Lim ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 80 KB

Various terminal alkynes in the presence of 5 mol% of RhCl(PPh 3 ) 3 were homo-coupled to the conjugated enynes. 1,6-Enynes in the presence of 5 mol% RhCl(PPh 3 ) 3 and 10 mol% Ag(I) salts underwent [2+2+2]-cyclization among two triple bonds and one pendant double bond in good to excellent yields.